Answer by
Ginny (2251)
B complex is a group of B vitamins, i.e. thiamine, riboflavin, niacin, pantothenic acid, pyridoxzine, folic acid, cyanocobalamin Excessive amounts of any of them can cause high or low blood pressure, insomnia, nausea, fatigue, headaches, itchy skin, dehydration, depression, joint pain, edema, numbness and/or tingling in fingers, kidney failure, anxiety, anemia, heart palpitations